SUBROUTINE watercloud(ngrid,nlay,ptimestep, & pplev,pplay,pdpsrf,pzlay,pt,pdt, & pq,pdq,pdqcloud,pdtcloud, & nq,tau,tauscaling,rdust,rice,nuice, & rsedcloud,rhocloud) ! to use 'getin' USE ioipsl_getincom IMPLICIT NONE c======================================================================= c Water-ice cloud formation c c Includes two different schemes: c - A simplified scheme (see simpleclouds.F) c - An improved microphysical scheme (see improvedclouds.F) c c There is a time loop specific to cloud formation c due to timescales smaller than the GCM integration timestep. c c Authors: Franck Montmessin, Francois Forget, Ehouarn Millour, c J.-B. Madeleine, Thomas Navarro c c 2004 - 2012 c======================================================================= c----------------------------------------------------------------------- c declarations: c ------------- #include "dimensions.h" #include "dimphys.h" #include "comcstfi.h" #include "callkeys.h" #include "tracer.h" #include "comgeomfi.h" #include "dimradmars.h" c Inputs: c ------ INTEGER ngrid,nlay INTEGER nq ! nombre de traceurs REAL ptimestep ! pas de temps physique (s) REAL pplev(ngrid,nlay+1) ! pression aux inter-couches (Pa) REAL pplay(ngrid,nlay) ! pression au milieu des couches (Pa) REAL pdpsrf(ngrid) ! tendence surf pressure REAL pzlay(ngrid,nlay) ! altitude at the middle of the layers REAL pt(ngrid,nlay) ! temperature at the middle of the layers (K) REAL pdt(ngrid,nlay) ! tendence temperature des autres param. real pq(ngrid,nlay,nq) ! traceur (kg/kg) real pdq(ngrid,nlay,nq) ! tendence avant condensation (kg/kg.s-1) REAL tau(ngridmx,naerkind) ! Column dust optical depth at each point REAL tauscaling(ngridmx) ! Convertion factor for dust amount real rdust(ngridmx,nlay) ! Dust geometric mean radius (m) c Outputs: c ------- real pdqcloud(ngrid,nlay,nq) ! tendence de la condensation H2O(kg/kg.s-1) REAL pdtcloud(ngrid,nlay) ! tendence temperature due ! a la chaleur latente REAL rice(ngrid,nlay) ! Ice mass mean radius (m) ! (r_c in montmessin_2004) REAL nuice(ngrid,nlay) ! Estimated effective variance ! of the size distribution real rsedcloud(ngridmx,nlay) ! Cloud sedimentation radius real rhocloud(ngridmx,nlay) ! Cloud density (kg.m-3) c local: c ------ ! for ice radius computation REAL Mo,No REAl ccntyp ! for time loop INTEGER microstep ! time subsampling step variable INTEGER imicro ! time subsampling for coupled water microphysics & sedimentation SAVE imicro REAL microtimestep ! integration timestep for coupled water microphysics & sedimentation SAVE microtimestep ! tendency given by clouds (inside the micro loop) REAL subpdqcloud(ngrid,nlay,nq) ! cf. pdqcloud REAL subpdtcloud(ngrid,nlay) ! cf. pdtcloud ! global tendency (clouds+physics) REAL subpdq(ngrid,nlay,nq) ! cf. pdqcloud REAL subpdt(ngrid,nlay) ! cf. pdtcloud REAL CBRT EXTERNAL CBRT INTEGER iq,ig,l LOGICAL,SAVE :: firstcall=.true. c ** un petit test de coherence c -------------------------- IF (firstcall) THEN IF(ngrid.NE.ngridmx) THEN PRINT*,'STOP dans watercloud' PRINT*,'probleme de dimensions :' PRINT*,'ngrid =',ngrid PRINT*,'ngridmx =',ngridmx STOP ENDIF if (nq.gt.nqmx) then write(*,*) 'stop in watercloud (nq.gt.nqmx)!' write(*,*) 'nq=',nq,' nqmx=',nqmx stop endif write(*,*) "watercloud: igcm_h2o_vap=",igcm_h2o_vap write(*,*) " igcm_h2o_ice=",igcm_h2o_ice write(*,*) "time subsampling for microphysic ?" #ifdef MESOSCALE imicro = 2 #else imicro = 15 #endif call getin("imicro",imicro) write(*,*)"imicro = ",imicro microtimestep = ptimestep/real(imicro) write(*,*)"Physical timestep is",ptimestep write(*,*)"Microphysics timestep is",microtimestep firstcall=.false. ENDIF ! of IF (firstcall) c-----Initialization subpdq(1:ngrid,1:nlay,1:nq) = 0 subpdt(1:ngrid,1:nlay) = 0 ! default value if no ice rhocloud(1:ngrid,1:nlay) = rho_dust c------------------------------------------------------------------ c Time subsampling for microphysics c------------------------------------------------------------------ DO microstep=1,imicro c------------------------------------------------------------------- c 1. Tendencies: c------------------ c------ Temperature tendency subpdt ! Each microtimestep we give the cloud scheme a stepped entry subpdt instead of pdt ! If imicro=1 subpdt is the same as pdt DO l=1,nlay DO ig=1,ngrid subpdt(ig,l) = subpdt(ig,l) & + pdt(ig,l) ! At each micro timestep we add pdt in order to have a stepped entry ENDDO ENDDO c------ Tracers tendencies subpdq c------ At each micro timestep we add pdq in order to have a stepped entry IF (microphys) THEN DO l=1,nlay DO ig=1,ngrid subpdq(ig,l,igcm_dust_mass) = & subpdq(ig,l,igcm_dust_mass) & + pdq(ig,l,igcm_dust_mass) subpdq(ig,l,igcm_dust_number) = & subpdq(ig,l,igcm_dust_number) & + pdq(ig,l,igcm_dust_number) subpdq(ig,l,igcm_ccn_mass) = & subpdq(ig,l,igcm_ccn_mass) & + pdq(ig,l,igcm_ccn_mass) subpdq(ig,l,igcm_ccn_number) = & subpdq(ig,l,igcm_ccn_number) & + pdq(ig,l,igcm_ccn_number) ENDDO ENDDO ENDIF DO l=1,nlay DO ig=1,ngrid subpdq(ig,l,igcm_h2o_ice) = & subpdq(ig,l,igcm_h2o_ice) & + pdq(ig,l,igcm_h2o_ice) subpdq(ig,l,igcm_h2o_vap) = & subpdq(ig,l,igcm_h2o_vap) & + pdq(ig,l,igcm_h2o_vap) ENDDO ENDDO c------------------------------------------------------------------- c 2. Main call to the different cloud schemes: c------------------------------------------------ IF (microphys) THEN CALL improvedclouds(ngrid,nlay,microtimestep, & pplay,pt,subpdt, & pq,subpdq,subpdqcloud,subpdtcloud, & nq,tauscaling) ELSE CALL simpleclouds(ngrid,nlay,microtimestep, & pplay,pzlay,pt,subpdt, & pq,subpdq,subpdqcloud,subpdtcloud, & nq,tau,rice) ENDIF c------------------------------------------------------------------- c 3. Updating tendencies after cloud scheme: c----------------------------------------------- IF (microphys) THEN DO l=1,nlay DO ig=1,ngrid subpdq(ig,l,igcm_dust_mass) = & subpdq(ig,l,igcm_dust_mass) & + subpdqcloud(ig,l,igcm_dust_mass) subpdq(ig,l,igcm_dust_number) = & subpdq(ig,l,igcm_dust_number) & + subpdqcloud(ig,l,igcm_dust_number) subpdq(ig,l,igcm_ccn_mass) = & subpdq(ig,l,igcm_ccn_mass) & + subpdqcloud(ig,l,igcm_ccn_mass) subpdq(ig,l,igcm_ccn_number) = & subpdq(ig,l,igcm_ccn_number) & + subpdqcloud(ig,l,igcm_ccn_number) ENDDO ENDDO ENDIF DO l=1,nlay DO ig=1,ngrid subpdq(ig,l,igcm_h2o_ice) = & subpdq(ig,l,igcm_h2o_ice) & + subpdqcloud(ig,l,igcm_h2o_ice) subpdq(ig,l,igcm_h2o_vap) = & subpdq(ig,l,igcm_h2o_vap) & + subpdqcloud(ig,l,igcm_h2o_vap) ENDDO ENDDO ENDDO ! of DO microstep=1,imicro c------------------------------------------------------------------- c 6. Compute final tendencies after time loop: c------------------------------------------------ c------ Temperature tendency pdtcloud DO l=1,nlay DO ig=1,ngrid pdtcloud(ig,l) = & subpdt(ig,l)/real(imicro)-pdt(ig,l) ENDDO ENDDO c------ Tracers tendencies pdqcloud DO l=1,nlay DO ig=1,ngrid pdqcloud(ig,l,igcm_h2o_ice) = & subpdq(ig,l,igcm_h2o_ice)/real(imicro) & - pdq(ig,l,igcm_h2o_ice) pdqcloud(ig,l,igcm_h2o_vap) = & subpdq(ig,l,igcm_h2o_vap)/real(imicro) & - pdq(ig,l,igcm_h2o_vap) IF(microphys) THEN pdqcloud(ig,l,igcm_dust_mass) = & subpdq(ig,l,igcm_dust_mass)/real(imicro) & - pdq(ig,l,igcm_dust_mass) pdqcloud(ig,l,igcm_dust_number) = & subpdq(ig,l,igcm_dust_number)/real(imicro) & - pdq(ig,l,igcm_dust_number) pdqcloud(ig,l,igcm_ccn_mass) = & subpdq(ig,l,igcm_ccn_mass)/real(imicro) & - pdq(ig,l,igcm_ccn_mass) pdqcloud(ig,l,igcm_ccn_number) = & subpdq(ig,l,igcm_ccn_number)/real(imicro) & - pdq(ig,l,igcm_ccn_number) ENDIF ENDDO ENDDO c------- Due to stepped entry, other processes tendencies can add up to negative values c------- Therefore, enforce positive values and conserve mass IF(microphys) THEN DO l=1,nlay DO ig=1,ngrid IF ((pq(ig,l,igcm_dust_number) + & ptimestep* (pdq(ig,l,igcm_dust_number) + & pdqcloud(ig,l,igcm_dust_number)) .le. 1.) & .or. (pq(ig,l,igcm_dust_mass) + & ptimestep* (pdq(ig,l,igcm_dust_mass) + & pdqcloud(ig,l,igcm_dust_mass)) .le. 1.e-20)) THEN pdqcloud(ig,l,igcm_dust_number) = & - pq(ig,l,igcm_dust_number)/ptimestep & - pdq(ig,l,igcm_dust_number) + 1. pdqcloud(ig,l,igcm_ccn_number) = & -pdqcloud(ig,l,igcm_dust_number) pdqcloud(ig,l,igcm_dust_mass) = & - pq(ig,l,igcm_dust_mass)/ptimestep & - pdq(ig,l,igcm_dust_mass) + 1.e-20 pdqcloud(ig,l,igcm_ccn_mass) = & -pdqcloud(ig,l,igcm_dust_mass) ENDIF IF ((pq(ig,l,igcm_ccn_number) + & ptimestep* (pdq(ig,l,igcm_ccn_number) + & pdqcloud(ig,l,igcm_ccn_number)) .le. 1.) & .or. (pq(ig,l,igcm_ccn_mass) + & ptimestep* (pdq(ig,l,igcm_ccn_mass) + & pdqcloud(ig,l,igcm_ccn_mass)) .le. 1.e-20)) THEN pdqcloud(ig,l,igcm_ccn_number) = & - pq(ig,l,igcm_ccn_number)/ptimestep & - pdq(ig,l,igcm_ccn_number) + 1. pdqcloud(ig,l,igcm_dust_number) = & -pdqcloud(ig,l,igcm_ccn_number) pdqcloud(ig,l,igcm_ccn_mass) = & - pq(ig,l,igcm_ccn_mass)/ptimestep & - pdq(ig,l,igcm_ccn_mass) + 1.e-20 pdqcloud(ig,l,igcm_dust_mass) = & -pdqcloud(ig,l,igcm_ccn_mass) ENDIF ENDDO ENDDO ENDIF DO l=1,nlay DO ig=1,ngrid IF (pq(ig,l,igcm_h2o_ice) + ptimestep* & (pdq(ig,l,igcm_h2o_ice) + pdqcloud(ig,l,igcm_h2o_ice)) & .le. 1.e-8) THEN pdqcloud(ig,l,igcm_h2o_ice) = & - pq(ig,l,igcm_h2o_ice)/ptimestep - pdq(ig,l,igcm_h2o_ice) pdqcloud(ig,l,igcm_h2o_vap) = -pdqcloud(ig,l,igcm_h2o_ice) ENDIF IF (pq(ig,l,igcm_h2o_vap) + ptimestep* & (pdq(ig,l,igcm_h2o_vap) + pdqcloud(ig,l,igcm_h2o_vap)) & .le. 1.e-8) THEN pdqcloud(ig,l,igcm_h2o_vap) = & - pq(ig,l,igcm_h2o_vap)/ptimestep - pdq(ig,l,igcm_h2o_vap) pdqcloud(ig,l,igcm_h2o_ice) = -pdqcloud(ig,l,igcm_h2o_vap) ENDIF ENDDO ENDDO c------Update the ice and dust particle size "rice" for output or photochemistry c------Only rsedcloud is used for the water cycle IF(scavenging) THEN DO l=1, nlay DO ig=1,ngrid rdust(ig,l)= & CBRT(r3n_q*(pq(ig,l,igcm_dust_mass)+ & (pdq(ig,l,igcm_dust_mass) & +pdqcloud(ig,l,igcm_dust_mass))*ptimestep)/ & (pq(ig,l,igcm_dust_number)+ & (pdq(ig,l,igcm_dust_number)+ & pdqcloud(ig,l,igcm_dust_number)*ptimestep))) rdust(ig,l)=min(max(rdust(ig,l),1.e-10),500.e-6) Mo = pq(ig,l,igcm_h2o_ice) & + pdqcloud(ig,l,igcm_h2o_ice)*ptimestep & + (pq(ig,l,igcm_ccn_mass) & + pdqcloud(ig,l,igcm_ccn_mass)*ptimestep) & *tauscaling(ig) + 1.e-30 No = (pq(ig,l,igcm_ccn_number) & + pdqcloud(ig,l,igcm_ccn_number)*ptimestep) & *tauscaling(ig) + 1.e-30 rhocloud(ig,l) = (pq(ig,l,igcm_h2o_ice) + & pdqcloud(ig,l,igcm_h2o_ice)*ptimestep) & / Mo * rho_ice & + (pq(ig,l,igcm_ccn_mass) & + pdqcloud(ig,l,igcm_ccn_mass)*ptimestep) & *tauscaling(ig)/ Mo * rho_dust rhocloud(ig,l) = min(max(rhocloud(ig,l),rho_ice),rho_dust) if ((Mo.lt.1.e-15) .or. (No.le.1.)) then rice(ig,l) = 1.e-8 else !! AS: only perform computations if conditions not met rice(ig,l)=(Mo / No * 0.75 / pi / rhocloud(ig,l))**(1./3.) rice(ig,l)=min(max(rice(ig,l),1.e-10),500.e-6) endif rsedcloud(ig,l)=max( rice(ig,l)*(1.+nuice_sed)* & (1.+nuice_sed)*(1.+nuice_sed), & rdust(ig,l) ) rsedcloud(ig,l)=min(rsedcloud(ig,l),1.e-4) ENDDO ENDDO ELSE if ((igcm_dust_mass.ne.0).and.(igcm_dust_number.ne.0)) then ! recompute rdust(), if we have dust_mass & dust_number tracers DO l=1,nlay DO ig=1,ngrid rdust(ig,l)= & CBRT(r3n_q*(pq(ig,l,igcm_dust_mass)+ & (pdq(ig,l,igcm_dust_mass) & +pdqcloud(ig,l,igcm_dust_mass))*ptimestep)/ & (pq(ig,l,igcm_dust_number)+ & (pdq(ig,l,igcm_dust_number)+ & pdqcloud(ig,l,igcm_dust_number)*ptimestep))) rdust(ig,l)=min(max(rdust(ig,l),1.e-10),500.e-6) ENDDO ENDDO endif ! of if ((igcm_dust_mass.ne.0).and.(igcm_dust_number.ne.0)) DO l=1,nlay DO ig=1,ngrid ccntyp = & 1.3e+8*max(tau(ig,1),0.001)/0.1*exp(-pzlay(ig,l)/10000.) ccntyp = ccntyp /ccn_factor rice(ig,l)=max( CBRT ( ((pq(ig,l,igcm_h2o_ice) & + pdqcloud(ig,l,igcm_h2o_ice)*ptimestep)/rho_ice & +ccntyp*(4./3.)*pi*rdust(ig,l)*rdust(ig,l)*rdust(ig,l)) & /(ccntyp*4./3.*pi) ), rdust(ig,l)) rsedcloud(ig,l)=max( rice(ig,l)*(1.+nuice_sed)* & (1.+nuice_sed)*(1.+nuice_sed), & rdust(ig,l) ) rsedcloud(ig,l)=min(rsedcloud(ig,l),1.e-4) ENDDO ENDDO ENDIF ! of IF(scavenging) ! used for rad. transfer calculations ! nuice is constant because a lognormal distribution is prescribed nuice(1:ngrid,1:nlay)=nuice_ref !-------------------------------------------------------------- !-------------------------------------------------------------- c A correction if a lot of subliming CO2 fills the 1st layer FF04/2005 c ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ c Then that should not affect the ice particle radius do ig=1,ngridmx if(pdpsrf(ig)*ptimestep.gt.0.9*(pplev(ig,1)-pplev(ig,2)))then if(pdpsrf(ig)*ptimestep.gt.0.9*(pplev(ig,1)-pplev(ig,3))) & rice(ig,2)=rice(ig,3) rice(ig,1)=rice(ig,2) end if end do c======================================================================= END